Embryology: Ovarian Cycle, Genetics, Embryonic Development------------------------------
- 1.In what days does the embryo start to bend?
- A.
11-12 days
- B.
16-18 days
- C.
20-21 days
- D.
14-15 days
- 2.What week does the neural tube START to close
- A.
Week 1
- B.
Week 2
- C.
Week 3
- D.
Week 4
- 3.The HOX/Homeobox gene is responsible for developing what part of the embryo
- A.
Craniocaudal region
- B.
Left-sided organs
- C.
Musculature of the limbs
- D.
Ventralization of organs
- 4.There are some points in meiosis where the oocyte line is paused until certain conditions are met. What are these stages?
- A.
Prophase I and Telophase II
- B.
Telophase I and Prophase II
- C.
Metaphase I and Anaphase II
- D.
Prophase I and Metaphase II
- 5.In which of these situations does a primary oocyte turn into a secondary oocyte
- A.
When a follicle is formed
- B.
When it is released from the primary follicle
- C.
When it turns atretic
- D.
When it is released from the secondary follicle
- 6.Which of the following structures is a precursor to the forebrain
- A.
Prechordal plate
- B.
Notochord
- C.
The first visceral arch
- D.
The second visceral arch
- 7.This is a condition in which the visceral organs are placed in the opposite direction
- A.
Eisenmenger's syndrome
- B.
Visceral Mirroring
- C.
Situs Invertus
- D.
Fetus deletus
- 8.The contiguous deletion of chromosomes 15q11 to 15q13 can be seen in what disorder?
- A.
Angelman syndrome
- B.
Prader-Willi syndrome
- C.
Both
- D.
Neither
- 9.The protein SHH (Sonic hedgehog protein) is synthesized by what?
- A.
Trophoblast
- B.
The yolk sac
- C.
Somite C3 to C5
- D.
Notochord
- 10.BMP4 along with FGF8 can develop which part of the embryo
- A.
Ventral Side
- B.
Dorsal Side
- C.
Both
- D.
Neither
- 11.This is a type of chromosomal disorder in which parts of the chromosome breaks under certain conditions
- A.
The presence of fragile sites
- B.
Contiguous Gene Deletion
- C.
Genetic Mosaicism
- D.
Nondisjunction
- 12.Mesoderm derivative responsible for developing the limb musculature of the embryo
- A.
Paraxial Mesoderm
- B.
Somite
- C.
Both
- D.
Neither
- 13.Which of the following is a precursor to the kidneys
- A.
Intermediate mesoderm
- B.
Lateral plate mesoderm
- C.
Somite
- D.
Notochord
- 14.Which of the following is a precursor to the Visceral serosa
- A.
Splanchnic Mesoderm
- B.
Somatic Mesoderm
- C.
Both
- D.
Neither
- 15.Xq27 is the chromosomal abnormality behind what disease?
- A.
Edward's syndrome
- B.
Angelman
- C.
Miller-Dieker
- D.
Fragile X
- 16.The trilaminar germ disc can be seen in what week?
- A.
Week 1
- B.
Week 2
- C.
Week 3
- D.
Week 4
- 17.The epithelial lining of the digestive and respiratory tract can be found in what germ cell derivative?
- A.
Endoderm
- B.
Somatic Mesoderm
- C.
Splanchnic Mesoderm
- D.
Ectoderm
- 18.BMP can develop the dorsal side of the embryo when it interacts with which of the following molecules
- A.
FGF-8
- B.
Noggin, Follistatin, Chordin
- C.
Both
- D.
SHH
- 19.Serotonin activates Mad-3. Mad3 can activate which of the following molecules?
- A.
PITX3
- B.
FGF
- C.
Nodal
- D.
Homeobox
- 20.These substances play a role in cranio-caudal development
- A.
Vitamin A1
- B.
HOX
- C.
Both
- D.
Neither
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